Abstract
Background: Accurately determining rates of energy expenditure under free-living conditions is important in understanding the mechanisms involved in the development and prevention of obesity. Metabolic carts are not portable enough for most free-living situations. The purpose of this study was to compare a portable, hand-held indirect calorimetry device (HealtheTech Incorporated, Golden, CO) to a metabolic cart (Physio- Dyne Instrument Corporation, Quogue, NY) during three different physiological states. Methods: Energy expenditure (EE) was measured by both the hand-held calorimeter (5- 10 min.) and the metabolic cart (15-20 min.) in 20 healthy subjects (18 to 35 years of
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